Stethacanthid elasmobranch remains from the Bear Gulch Limestone (Namurian E2b) of Montana. American Museum novitates ; no. 2828

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dc.contributor.authorLund, Richard.en_US
dc.date.accessioned2005-10-06T17:06:23Z
dc.date.available2005-10-06T17:06:23Z
dc.date.issued1985en_US
dc.description24 p. : ill. ; 26 cm.en_US
dc.descriptionIncludes bibliographical references (p. 21-24).en_US
dc.description.abstract"Four chondrichthyan species assigned to the cladodontid genus Stethacanthus are described from the Bear Gulch Limestone of Montana. Specimens are referred to Stethacanthus cf. S. altonensis and S. cf. S. productus. Two other species are too immature to assign with certainty to known stethacanthid spine species. The histology and morphology of three isolated cladodont tooth types is described, one of which is referred to Cladodus robustus. The species of Stethacanthidae are distinguishable on the shapes and proportions of palatoquadrate and mandible, numbers of tooth families and pectoral prearticular basals, morphology of the pelvic girdle and areas of squamation. Comparison with other Bear Gulch stethacanthids strongly suggests that the presence of specialized cranial and first dorsal fin squamation, with the presence of the first dorsal fin and spine, are secondary sexual characters of mature males. Cladoselache is indicated as the sister group of the Stethacanthidae, with the 'Symmoriidae' being the sister group of Stethacanthus altonensis"--P. [1].en_US
dc.format.extent4059858 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2246/3554
dc.languageengen_US
dc.language.isoen_US
dc.publisherNew York, N.Y. : American Museum of Natural Historyen_US
dc.relation.ispartofseriesAmerican Museum novitates ; no. 2828en_US
dc.subject.lccQL1 .A436 no.2828, 1985en_US
dc.subject.lcshStethacanthidae.en_US
dc.subject.lcshChondrichthyes, Fossil -- Montana -- Fergus County.en_US
dc.subject.lcshFishes, Fossil -- Montana -- Fergus County.en_US
dc.subject.lcshPaleontology -- Mississippian -- Montana -- Fergus County.en_US
dc.subject.lcshPaleontology -- Montana -- Fergus County.en_US
dc.titleStethacanthid elasmobranch remains from the Bear Gulch Limestone (Namurian E2b) of Montana. American Museum novitates ; no. 2828en_US
dc.title.alternativeStethacanthid remainsen_US
dc.typetexten_US

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